中低速磁浮连续轨道梁车致动力行为研究  

Study on Dynamic Behavior of Medium-Low Speed Maglev Vehicles on Continuous Track Beams

作　　者：洪沁烨 HONG Qin-ye(China Railway Si Yuan Survey and Design Group Corporation,Wuhan 430063,China)

机构地区：[1]中铁第四勘察设计院集团有限公司,武汉430063

出　　处：《建材世界》2025年第2期78-81,94,共5页The World of Building Materials

摘　　要：为研究中低速磁浮列车在混凝土连续轨道梁上运行时的系统竖向结构动力响应,采用模态综合叠加法建立中低速磁浮列车-混凝土连续轨道梁耦合振动模型。以某混凝土连续箱型轨道梁和某混凝土连续工字型轨道梁为研究对象,分别对磁浮列车-轨道梁耦合振动系统各个子系统竖向结构动力响应进行对比分析。结果表明:混凝土连续工字梁的结构动力响应略大于连续箱梁的动力响应,二者的振动发生在低频段8.5 Hz附近,中频段35~45 Hz之间,且当响应频率与轨道梁模态频率重合或接近时,响应会急剧增大;混凝土连续箱梁和连续工字梁的竖向动挠度均满足规范限值;空气弹簧可以很好地隔断高频段的动力响应,起到隔振减振的效果,从而提高磁浮列车在运行过程中的平稳性。In order to study the vertical structural dynamic response of medium-low speed maglev vehicles running on concrete continuous beam bridge,the modal superposition method was used to establish the medium-low speed maglev vehicles-concrete continuous beam bridge coupled vibration model.The vertical structural dynamic response of each subsystem of the coupled vibration system of the maglev train-beam was compared and analyzed for the research object of a concrete continuous box beam and a concrete continuous I-beam.The results show that the structural dynamic response of the concrete continuous I-beam is slightly greater than that of the concrete continuous box beam,and the vibrations occur in the low-frequency range of 8.5 Hz,the middle-frequency range of 35~45 Hz.When the response frequency is the same or close to the beam modal frequency,the response will increase sharply.The vertical dynamic deflection of the concrete continuous box beam and I-beam both meet the limit value specified in the code;the air spring can effectively isolate the high-frequency dynamic response and play a damping and vibration reduction role,thereby improving the stability of the maglev train during operation.

关 键 词：中低速磁浮列车 连续梁桥 耦合振动 

分 类 号：U237[交通运输工程—道路与铁道工程]